There is no doubt in my mind what happened here, especially as I was on the thread that was allegedly the tipping point, according to the E mail sent to AF by MNHQ, which Justine cut, pasted and posted publically last night.
It was IMO a gross error of judgement to pick that thread when the context of it was AF's unstinting support to the OP and a range of posts (not just from one poster) that either mocked or goaded the OP herself, or other posters who were actually listening to the OP and trying to help her work through a difficult and sensitive juncture in her life.
From the picture I've built up of AF though, she's not only a magnificent, kind, strong woman who genuinely cares about people on the other side of the screen who need advice, she's not stupid and I can imagine feels a bit powerless and frustrated by the effect her banning has created.
I reckon she knows all about 'Tall Poppy Syndrome' because we've seen it happen before on Mumsnet. I can imagine she's cringed at some of the (understandable) support because she knows from experience that whe it happens, there will always be a backlash from posters who get miffed by one poster receiving admiration, however well-deserved that good reputation is.
So she'd be the last person to endorse any suggestions that this board would crumble without her and if I've judged her correctly, would hope instead that what's happened generates the real discussions that should be happening.
The one about how Mumsnet protects its users from trolls, goaders and personal attacks in all their various guises. It would be a mistake to think those trolls, goaders and attackers are all male misogynists or Men's Rights Activists, as it's a mistake to think that misogynists are always male. The individuals we are talking about are women as well as men.
Then another discussion about the bigger picture of how feminist voices are being silenced online generally and how sites whose brand name is gendered and therefore blatantly invites women users, ought to be at the forefront of a campaign to stop that silencing and yes, hate speech against women.
That's what I believe AF would like to happen and if she returns I hope she'll comment. Until then, I reckon she'd want everyone else to keep helping posters in difficulty, reporting those who aren't in the business of doing that.